Summer Session Registration is now open!

Summer Session Registration is now open! Columbia University students register through Vergil, Visiting Students apply now. Learn more.

Academic Calendar

2025

Session Dates
Term	Dates
Term Full Summer Term (X)	Dates May 26–August 15 Classes begin on May 27 Make-up day for Memorial Day is May 30
Term Session A	Dates May 26–July 4 Classes begin on May 27 Make-up day for Memorial Day is May 30
Term Session B	Dates July 7–August 15
Term Session G	Dates May 26–June 20 Classes begin on May 27 Make-up day for Memorial Day is May 30
Term Session J	Dates June 23–July 18
Term Session H	Dates June 9–July 4
Term Session R	Dates July 7–August 1

Holidays and Special Dates
Holiday	Details
Holiday Memorial Day	Details No classes on May 26, University closed. Memorial Day Make-Up Day: May 30
Holiday Juneteenth	Details No classes on June 19, University closed. Juneteenth Make-Up Day: June 20
Holiday Independence Day	Details No classes on July 4, University closed. Independence Day Make-Up Day: N/A
Holiday Reading Day	Details Session A: June 27 (No classes) Session B/X: August 13 (No classes)
Holiday Final Exams	Details Exams held during normally scheduled class time. Session A: July 2 (T/R classes) and July 3 (M/W classes) Session B/X: August 14 (T/R classes) and August 15 (M/W classes)

Late Registration Dates
Late registration, which is the same for all students, takes place on the second, third, fourth, and fifth days of each session. For some courses, permission from the instructor may be required. A $50.00 fee will be charged during the late registration period. A $100.00 fee will be charged after the late registration period.
Term	Dates
Term Full Summer Term (X)	Dates May 27–June 2
Term Session A	Dates May 27–June 2
Term Session B	Dates July 7–July 11
Term Session G	Dates May 27–June 2
Term Session J	Dates June 23–June 27
Term Session H	Dates June 9–June 13
Term Session R	Dates July 7–July 11

Add/Drop with Full Refund Deadlines
Term	Dates
Term Full Summer Term (X)	Dates May 27–June 2
Term Session A	Dates May 27–June 2
Term Session B	Dates July 7–July 11

Last Day to Drop or Withdraw from an Individual Course or Change to Pass/Fail
Term	Date
Term Full Summer Term (X)	Date July 21
Term Session A	Date June 23
Term Session B	Date August 4

Columbia Student Course Registration Dates

Registration, add/drop, and withdrawal deadlines.

Visiting Student Admissions Deadlines

Application deadlines and program dates.

Visiting Student Course Registration Dates

Registration, add/drop, and withdrawal deadlines.